Path of Exile hits you with a weird truth pretty fast: there's no pile of gold waiting at the end of a pack. Everything runs on Orbs, and those Orbs are both money and tools. One minute you're tossing a Chaos Orb at a trade, the next you're burning the same currency trying to fix a stubborn resist roll. If you're new, it can feel like you're always broke. That's why some players look up ways to buy poe currency while they're still learning what's worth keeping and what's just vendor trash.
How currency really builds up in-game
The simple path is still the most common: play, loot, sel